72results about How to "Preparation Process Green" patented technology

The invention provides a preparation method of a superabsorbent resin used for a high-molecular gel extinguishing agent. The preparation method comprises: mixing acrylic acid and a sodium carbonate aqueous solution to prepare a neutralization solution; successively adding a cross-linking agent, an initiator and an adhesion promoter into the neutralization solution to prepare a polymerization solution; performing polymerization to prepare the superabsorbent resin; and cutting into particles with a diameter of 10-20 mm to further prepare superabsorbent resin particles with a particle size of 40-150 meshes. The preparation method is simple, and the superabsorbent resin prepared by the method is convenient to used and excellent in fire extinguishing effect.

The invention discloses a preparation method of a silver-loaded nano cellulose-chitosan composite film, the preparation method of the silver-loaded nano cellulose-chitosan composite film comprises the following steps: adding sodium periodate into a nano cellulose solution, stirring in a dark place, centrifuging for separation, and washing to obtain dialdehydo nano cellulose; adding a newly-prepared saturated silver ammonia solution for preparation of silver-loaded nano cellulose; mixing the silver-loaded nano cellulose with a chitosan solution to obtain a silver-loaded nano cellulose-chitosan antibacterial film. Nano silver particles prepared in the method are evenly distributed in dialdehydo nano cellulose network structures, the easy agglomeration problem of the nano silver particles can be well solved, the preparation process does not require the use of special instruments, also does not need a chemical reducing agent, and the production cost is reduced. Through use of good mechanical properties of the nano cellulose, the low mechanical strength problem of the chitosan film is improved, and the antibacterial property of the chitosan film is improved by silver loading operation. The silver-loaded nano cellulose-chitosan composite film has broad application prospects in antibacterial wound dressings and food packaging and other industries.

The invention discloses a composite particle with multiple core-shell structures. The composite particle uses inorganic silica nanoparticles as a core, uses an organic acrylate polymer as a middle layer, and uses a carbon nanotube adsorption layer as a shell. The invention also discloses a preparation method for the composite particle, first nano-silica is synthesized through a Stober method, thenthe surface of nano-silica is coated with an acrylate polymer layer based on a dispersion polymerization method, and an initiator that can be subjected to hydrolytic ionization is used to achieve coating of the nano silica surface with the polymer and charge modification in one step, then further carbon nanotubes are adsorbed through electrostatic self-assembly. The invention provides the composite particle with multiple core-shell structures and the preparation method thereof, the preparation process is green and efficient, and does not need complicated functional modification, and the prepared composite particle has excellent overall performance.

The invention relates to an instant selenium-enriched sweet potato solid beverage and a preparing method. The instant selenium-enriched sweet potato solid beverage is characterized in that the instant selenium-enriched sweet potato solid beverage comprises, by weight, 50-90% of sweet potato extractives, 1-50% of konjac glucomannan, 1-5% of stevia, 0.5-3% tea polyphenol and 0.001-0.1% selenium-enriched yeast. The preparing method of the instant selenium-enriched sweet potato solid beverage comprises the following main steps of (a) blending materials and (b) carrying out drying and pelletizing. A preparing method for the sweet potato extractives comprises the following main steps of (a) raw material fluid preparation, (b) sedimentation and centrifugation, (c) separation and (d) concentration. Compared with the prior art, the instant selenium-enriched sweet potato solid beverage is a natural product, is rich in nutrition ingredients, and contains rich sweet potato alkaloid and mineral nutrition. According to the instant selenium-enriched sweet potato solid beverage and the preparing method, waste materials can be changed into valuable things, and the effluent discharge in the production process of sweet potato starch can be reduced in a large scale.

The invention discloses a preparation method of three-dimensional carrageenan/sodium alginate double network structure gel spheres. The method comprises the following steps: respectively taking carrageenan and sodium alginate, adding deionized water, and performing uniform mixing to form a carrageenan and sodium alginate mixture; dropwise adding the carrageenan and sodium alginate mixture into a K<+> solution, and soaking obtained drops for 4-8 h to obtain gel spheres; soaking the gel spheres in a Ca<2+> solution for 8 h, and then soaking and washing the gel spheres with deionized water to obtain hydrogel; and freeze-drying the hydrogel to obtain the target gel spheres. The product prepared in the invention has the advantages of simple preparation process, easiness in control of conditions, low cost, small rupture possibility in the swelling process, excellent adsorption property and excellent mechanical properties.

The invention relates to the technical field of polyvinyl chloride heat stabilizers, in particular to an arginine metal complex, a compound heat stabilizer and an application thereof. The compound heat stabilizer comprises components as follows: 2-6 phr of an arginine metal complex, 0-0.9 phr of arginine, 0.3-0.9 phr of an auxiliary stabilizer, 0.4-1.2 phr of a lubricant and 0.4-1.2 phr of an antioxidant. The arginine metal complex is used as a main stabilizer of the compound heat stabilizer for PVC and has good initial whiteness and long-term stability, and the mechanical performance and apparent quality of a PVC product can be improved. The PVC product using the compound heat stabilizer has good initial whiteness and long-term stability, excellent heat stabilization effect and good industrial prospects.

The invention discloses a method for preparing 1-deoxynojirimycin (1-DNJ) from mulberry twigs through solid fermentation, and belongs to the field of medicines and healthcare products. According to the method, a culture medium, which is mainly composed of mulberry twigs, is adopted; bacillus subtilis 20632 is taken as the fermentation strain to carry out solid fermentation; wherein the mulberry twig solid fermentation conditions are as follows: pH value is 6.6-9.2; water, which is used to wet mulberry twigs, accounts for 40 to 65% of the total weight of mulberry twigs; 1.5 % of lactose and 1.5 % of peptone are added into the wetting liquid and taken as the carbon source; and the solid fermentation lasts for 2 to 5 days at a temperature of 37 DEG C. After fermentation, the fermentation product is subjected to extraction, membrane filtration, condensation, and drying so as to obtain high quality 1-DNJ. The solid fermentation method has the advantages of high yield, high purity product, low cost, and suitability for large scale industrial production.

The invention provides a flame-retardant smoke-inhibition light-weight high-strength high-molecular material, and a preparation method thereof. The flame-retardant smoke-inhibition light-weight high-strength high-molecular material comprises following steps: 1, a gelatinizing agent, an oil phase reaction monomer, an oil phase crosslinking agent, an initiator, and a composite flame-retardant smoke-inhibition agent are mixed, and are stirred to be uniform, a dispersion phase is added for emulsification so as to form a uniform fine gel emulsion which is stagnant in upside down position; the gel emulsion is subjected to thermal induced polymerization reaction, and after reaction drying is carried out so as to obtain the flame-retardant smoke-inhibition light-weight high-strength high-molecularmaterial. The flame resistance of the flame-retardant smoke-inhibition light-weight high-strength high-molecular material is capable of reaching V-0 grade or higher only with slightly reduced mechanical performance.

The invention discloses a preparation method and application of K1.33Mn8O16. Manganous salt, sylvite and organic carboxylic acid are mixed with water, and stirring is carried out to perform reaction to obtain sol; drying and dehydration are carried out on the sol to obtain gel; the gel is calcined to obtain the K1.33Mn8O16. The preparation method is simple, convenient and easy to operate, and has the advantages of green, environmental-friendliness, safety and low cost. When the prepared K1.33Mn8O16 is used as an electrode material for making a super capacitor electrode, the super capacitor electrode shows highly-reversible potassium ion intercalation-deintercalation behaviors and rechargeable and dischargeable performance, can obtain a specific capacitance of 110F g<-1> under a voltage of 0 to 1.2V, and has the advantages of good reversibility and wide working potential window.

The invention discloses a photo-curing organic silicon liquid coating material as well as a preparation method and application thereof. The photo-curing organic silicon liquid coating material is prepared by taking linear polysiloxane, silicon resin, white carbon black and mercaptosilane as main raw materials. The mercaptosilane is subjected to condensation reaction with hydroxyl on the white carbon black through alkoxy on the mercaptosilane, so that the white carbon black is modified, structured agglomeration of the white carbon black due to the fact that the white carbon black contains a large amount of hydroxyl can be prevented, the surface of the white carbon black can contain high-activity mercapto, and cross-linking reaction between the white carbon black reinforcing agent and an organic silicon matrix is achieved. Meanwhile, active sulfydryl of sulfydryl silane and vinyl of linear polyorganosiloxane are subjected to click chemistry under ultraviolet irradiation to achieve normal-temperature cross-linking curing, so that the bottleneck that an existing organosilicone coating material needs a high-temperature condition for cross-linking curing is solved, and the energy consumption can be obviously reduced; meanwhile, thermal decomposition of the heat-sensitive material due to high temperature and residue of impurities such as decomposers and the like in the cross-linking and curing process can be reduced, and the coating material is endowed with more excellent mechanical, insulating and weather-proof properties and the like.